" From: Glen Hoag <hoag@xxxxxxxxxx> " " IIRC, there is at least one new motor " mount boss on the 1975-up block to accommodate the Pacer brackets, so " in that regard, the Pacer block was different, but once changed, the " same block was used on everything until the next change, which I " think was for the Eagle front axle mount. I think that extra boss is " where the knock sensor wound up on the 4.0 block. afaik it's one of the original amc mount holes; i've read several references to drilling the amc mount out to 12mm [the knock sensor thread] and getting a metric bolt. i believe the 4.0 normally uses new holes just fwd of the amc ones. ________________________________________________________________________ Andrew Hay the genius nature internet rambler is to see what all have seen adh@xxxxxxxxxxxxxxxxx and think what none thought _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com